FR724570A - Improvements to filters for breathing apparatus or air purifiers - Google Patents

Improvements to filters for breathing apparatus or air purifiers

Info

Publication number
FR724570A
FR724570A FR724570DA FR724570A FR 724570 A FR724570 A FR 724570A FR 724570D A FR724570D A FR 724570DA FR 724570 A FR724570 A FR 724570A
Authority
FR
France
Prior art keywords
filters
breathing apparatus
air purifiers
purifiers
air
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
Other languages
French (fr)
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Pirelli and C SpA
Original Assignee
Pirelli SpA
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Pirelli SpA filed Critical Pirelli SpA
Application granted granted Critical
Publication of FR724570A publication Critical patent/FR724570A/en
Expired legal-status Critical Current

Links

Classifications

    • A—HUMAN NECESSITIES
    • A62—LIFE-SAVING; FIRE-FIGHTING
    • A62B—DEVICES, APPARATUS OR METHODS FOR LIFE-SAVING
    • A62B21/00—Devices for producing oxygen from chemical substances for respiratory apparatus

Landscapes

  • Health & Medical Sciences (AREA)
  • Emergency Medicine (AREA)
  • Pulmonology (AREA)
  • General Health & Medical Sciences (AREA)
  • Business, Economics & Management (AREA)
  • Emergency Management (AREA)
FR724570D 1930-10-18 1931-10-15 Improvements to filters for breathing apparatus or air purifiers Expired FR724570A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT724570X 1930-10-18

Publications (1)

Publication Number Publication Date
FR724570A true FR724570A (en) 1932-04-29

Family

ID=11315062

Family Applications (1)

Application Number Title Priority Date Filing Date
FR724570D Expired FR724570A (en) 1930-10-18 1931-10-15 Improvements to filters for breathing apparatus or air purifiers

Country Status (1)

Country Link
FR (1) FR724570A (en)

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